5136521389 has 16 divisors (see below), whose sum is σ = 5740001280. Its totient is φ = 4567864320.

The previous prime is 5136521359. The next prime is 5136521393. The reversal of 5136521389 is 9831256315.

It is a cyclic number.

It is not a de Polignac number, because 5136521389 - 2⁷ = 5136521261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5136521339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102949 + ... + 144469.

It is an arithmetic number, because the mean of its divisors is an integer number (358750080).

Almost surely, 2^5136521389 is an apocalyptic number.

It is an amenable number.

5136521389 is a deficient number, since it is larger than the sum of its proper divisors (603479891).

5136521389 is a wasteful number, since it uses less digits than its factorization.

5136521389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41940.

The product of its digits is 194400, while the sum is 43.

The square root of 5136521389 is about 71669.5290133820. The cubic root of 5136521389 is about 1725.3996289263.

The spelling of 5136521389 in words is "five billion, one hundred thirty-six million, five hundred twenty-one thousand, three hundred eighty-nine".